As part of your search for the best cajon, please talk directly with local cajon builders. Locally made cajons contribute to your regional economy and provide an environmentally sound alternative to shipping a plywood box full of air halfway around the planet.
Cajons are one of the worlds most universal instruments. Drums speak to humans from the heart. Good cajons can be built by local woodwookers with simple tools even in remote areas. Listed above are links to the cajon drum builders of the world as retrieved by Internet searches from March 2018 to January 2020. I am sure there are many others not listed. Please send me updates and correction if you have additional information. Thanks.